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Unread 10-12-2016, 10:32 AM   #1
Not Yet Wild
 
Join Date: May 2016
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Default Battery impedence prob?

48V 2000 club car carry-all6.has six 8V batts.had an issue where charger would not kick on even tho pack was showing 47.8V.So i hook another known good charger and it starts humming,but amp meter stays at zero,so i measure charging voltage and it is around 60V but real unstable.so i start measuring individual batts and find one at 17V!!!!.never seen this in past,so just curious..internally shorted??
replaced Batt and all is fine now
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Unread 10-12-2016, 10:57 AM   #2
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Default Re: Battery impedence prob?

Never seen one read that high but I have seen a 12 volt battery that was dead as a doornail (amp wize) read somewhere around 15 volts...
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Unread 10-12-2016, 11:15 AM   #3
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Default Re: Battery impedence prob?

You are correct, bad batteries develop a high internal impedance, that causes the battery voltgage to be high during charge and also prevents current flow during use.
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Unread 10-12-2016, 11:57 AM   #4
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Default Re: Battery impedence prob?

The battery that has 60V across it during charge has an open cell in it. I have seen them fail that way a few times.
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Unread 10-12-2016, 12:33 PM   #5
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Default Re: Battery impedence prob?

Quote:
Originally Posted by Volt_Ampere View Post
The battery that has 60V across it during charge has an open cell in it. I have seen them fail that way a few times.
thanks guys
the bad batt measuered an unstable 17V while charger was hooked up.
the whole pack went to 60V (unstable) instantly when i plugged in charger in which i knew was not normal.
thanks again
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Unread 10-13-2016, 04:48 PM   #6
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Default Re: Battery impedence prob?

But wait, you know you just can't replace one battery. And impedance is for AC circuits.
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